Error 2002F..... apple.com/support-2002F

It means you have a network issue of some sort. Try connecting the Mac directly to the router using an Ethernet cable (may need a Thunderbolt to Gigabit Ethernet Adapter for some models). An Ethernet connection provides a faster more reliable connection that bypasses any hard to troubleshoot WiFi issues. It is possible it may be an issue with your ISP or your local Internet. You can try a PRAM Reset and you can try rebooting your router by turning the router off for a minute and back on making sure to wait at least five minutes for the router to finish booting before attempting to boot into Internet Recovery or the Apple Diagnostics.

If you are trying to boot into Internet Recovery Mode, then another option is to create a bootable macOS USB installer if you have access to another Mac capable of running an OS that the non-working Mac can use:

How to create a bootable installer for macOS - Apple Support